Electric dipole moment of the deuteron in the standard model with NN − ΛN − ΣN coupling

Abstract

We calculate the electric dipole moment (EDM) of the deuteron in the standard model with |ΔS|=1 interactions by taking into account the NN−ΛN−ΣN channel coupling, which is an important nuclear level systematics. The two-body problem is solved with the Gaussian Expansion Method using the realistic Argonne v18 nuclear force and the YN potential which can reproduce the binding energies of Λ3H, Λ3He, and Λ4He. The |ΔS|=1 interbaryon potential is modeled by the one-meson exchange process. It is found that the deuteron EDM is modified by less than 10%, and the main contribution to this deviation is due to the polarization of the hyperon–nucleon channels. The effect of the YN interaction is small, and treating ΛN and ΣN channels as free is a good approximation for the EDM of the deuteron.